Halogenoolefin pesticides

Abstract

A method of combating arthropods and nematodes which comprises applying thereto, to a habitat thereof or to an area from which they are to be excluded an arthropodicidally or nematocidally effective amount of at least one long-chain halogenoolefine of the formula (I) ##STR1## in which R represents a straight-chain or branched alkyl radical with 8 to 25 carbon atoms in the straight chain, the alkyl radical optionally being interrupted once or several times by a --C.tbd.C-- and/or ##STR2## in which Z and Z 1 are identical or different and represent hydrogen or methyl and R 1 represents hydrogen, alkyl or halogen. Those compounds are new wherein R has at least 12 carbon atoms in the straight chain.

What is claimed is: 
     
       1. 1,1-Difluoro-1-nonadecene of the formula   CH.sub.3 --(CH.sub.2).sub.7 ═CH--CH--(CH.sub.2).sub.7 --CH═CF.sub.2.